Since ecosystems can be as small as a single tree
or as large as entire forest, there
are lots and lots of different ecosystems in the Upper Peninsula
of Michigan. When
you want to talk about how a certain natural area functions together,
you can call it
a biome. A biome is a very specialized ecosystem that only
exists in a certain
area or climate. They are identified by factors like temperature,
rainfall, soil type and
altitude.

For more information about ecosystems, check out
some of the following links: